Hey, I've just made a new map involving drones, but I can't seem to get the go the right way.Can someone experienced help me with that drone thing?

In the picture below you see how I want the drones to move. I just want them to go up or down, and not to the left or right. The drones don't need to disapper, just go up and down all the timeAnyone know how to do that?Heres the map-data:

Then what you need to do is make two fake tiles on either side of each pillar. The ninja can go through them, but they behave like normal tiles to the drone. This is hard as hell to do if you don't know the trick, so here's tutorial.

Now, what you want to do is place two tiles of a shape nowhere else in the map on either side of the pillar.Next, find those two in the tile code. They will be different numbers from all the rest.Once you find them, delete them and put a dot in their place.I'd recommend copying the now.If you load it now, you'll get the desired effect, except that the tiles are visible.To get rid of that, copy the data and paste it somewhere, then delete the two tiles.Now, load the data you copied, and voila!